docs: def flatlist_dropdup(list_of_lists):
      """Make a single list out of a list of lists, and drop all duplicates.
  
      Args:
          list_of_lists: List of lists.
  
      Returns:
          list: List of single objects.
  
      """
      return list(set([str(item) for sublist in list_of_lists for item in sublist]))